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Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides

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Dense surface functionalization using peptides that recognize differences in organized structures of self-assembling

Toshiki Sawada¹, Hisakazu Mihara

¹Department of Bioengineering, Tokyo Institute of Technology, 4259-B40 Nagatsuta-cho, Yokohama, Japan.

Molecular Biosystems

|February 2, 2012

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Novel peptides were identified that selectively bind to self-assembling peptide nanomaterials. These specific peptides recognize organized fine-structures and can be used to functionalize nanomaterials for applications in cell adhesion and biomaterial development.

Area of Science:

Biomaterials Science
Peptide Chemistry
Nanotechnology

Background:

Self-assembling peptide nanomaterials offer versatile platforms for biomedical applications.
Developing methods for precise functionalization of these nanomaterials is crucial for controlling their properties and interactions.
Selective recognition of specific nanostructures is key for targeted applications.

Purpose of the Study:

To identify novel peptides that selectively bind to self-assembling peptide nanomaterials.
To characterize the binding affinity and specificity of these identified peptides.
To demonstrate the utility of these peptides for functionalizing peptide nanomaterials.

Main Methods:

Phage display technology was employed to screen for peptides with affinity to peptide nanofibers.

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Enzyme-linked immunosorbent assays (ELISAs) and dot blot assays were used to determine binding specificity and affinity.

Cell adhesion assays were performed using RGDS-conjugated peptides to assess functionalization efficacy.

Main Results:

Novel peptides were isolated that exhibit selective binding to specific peptide nanofibers.
One peptide, Thr-Tyr-Leu-Pro-Trp-Pro-Ala, showed a high affinity constant (2.6 × 10^6 M^-1) for target nanofibers.
The screened peptides were shown to bind to discrete sites and enable controlled cell adhesion upon functionalization.

Conclusions:

Screened peptides can accurately recognize the organized fine-structures of self-assembled peptide nanomaterials.
Conjugating functional groups to these specific peptides allows for effective functionalization of nanomaterials.
Simultaneous use of multiple specific peptides can lead to highly dense functionalized nanomaterials.